TY - JOUR
T1 - Serum immunoregulatory proteins as predictors of overall survival of metastatic melanoma patients treated with ipilimumab
AU - Koguchi, Yoshinobu
AU - Hoen, Helena M.
AU - Bambina, Shelly A.
AU - Rynning, Michael D.
AU - Fuerstenberg, Richard K.
AU - Curti, Brendan D.
AU - Urba, Walter J.
AU - Milburn, Christina
AU - Bahjat, Frances Rena
AU - Korman, Alan J.
AU - Bahjat, Keith S.
N1 - Publisher Copyright:
© 2015 American Association for Cancer Research.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - Treatment with ipilimumab improves overall survival (OS) in patients with metastatic melanoma. Because ipilimumab targets T lymphocytes and not the tumor itself, efficacy may be uniquely sensitive to immunomodulatory factors present at the time of treatment. We analyzed serum from patients with metastatic melanoma (247 of 273, 90.4%) randomly assigned to receive ipilimumab or gp100 peptide vaccine. We quantified candidate biomarkers at baseline and assessed the association of each using multivariate analyses. Results were confirmed in an independent cohort of similar patients (48 of 52, 92.3%) treated with ipilimumab. After controlling for baseline covariates, elevated chemokine (C-X-C motif) ligand 11 (CXCL11) and soluble MHC class I polypeptide-related chain A (sMICA) were associated with poor OS in ipilimumab-treated patients [log10 CXCL11: HR, 1.88; 95% confidence interval (CI), 1.14- 3.12; P = 0.014; and log10 sMICA quadratic effect P = 0.066; sMICA (≥ 247 vs. 247): HR, 1.75; 95% CI, 1.02-3.01]. Multivariate analysis of an independent ipilimumab-treated cohort confirmed the association between log10 CXCL11 and OS (HR, 3.18; 95% CI, 1.13-8.95; P = 0.029), whereas sMICA was less strongly associated with OS [log10 sMICA quadratic effect P = 0.16; sMICA (≥247 vs. 247): HR, 1.48; 95% CI, 0.67-3.27]. High baseline CXCL11 and sMICA were associated with poor OS in patients with metastatic melanoma after ipilimumab treatment but not vaccine treatment. Thus, pretreatment CXCL11 and sMICA may represent predictors of survival benefit after ipilimumab treatment as well as therapeutic targets.
AB - Treatment with ipilimumab improves overall survival (OS) in patients with metastatic melanoma. Because ipilimumab targets T lymphocytes and not the tumor itself, efficacy may be uniquely sensitive to immunomodulatory factors present at the time of treatment. We analyzed serum from patients with metastatic melanoma (247 of 273, 90.4%) randomly assigned to receive ipilimumab or gp100 peptide vaccine. We quantified candidate biomarkers at baseline and assessed the association of each using multivariate analyses. Results were confirmed in an independent cohort of similar patients (48 of 52, 92.3%) treated with ipilimumab. After controlling for baseline covariates, elevated chemokine (C-X-C motif) ligand 11 (CXCL11) and soluble MHC class I polypeptide-related chain A (sMICA) were associated with poor OS in ipilimumab-treated patients [log10 CXCL11: HR, 1.88; 95% confidence interval (CI), 1.14- 3.12; P = 0.014; and log10 sMICA quadratic effect P = 0.066; sMICA (≥ 247 vs. 247): HR, 1.75; 95% CI, 1.02-3.01]. Multivariate analysis of an independent ipilimumab-treated cohort confirmed the association between log10 CXCL11 and OS (HR, 3.18; 95% CI, 1.13-8.95; P = 0.029), whereas sMICA was less strongly associated with OS [log10 sMICA quadratic effect P = 0.16; sMICA (≥247 vs. 247): HR, 1.48; 95% CI, 0.67-3.27]. High baseline CXCL11 and sMICA were associated with poor OS in patients with metastatic melanoma after ipilimumab treatment but not vaccine treatment. Thus, pretreatment CXCL11 and sMICA may represent predictors of survival benefit after ipilimumab treatment as well as therapeutic targets.
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U2 - 10.1158/0008-5472.CAN-15-2303
DO - 10.1158/0008-5472.CAN-15-2303
M3 - Article
C2 - 26627641
AN - SCOPUS:84955285589
SN - 0008-5472
VL - 75
SP - 5084
EP - 5092
JO - Cancer Research
JF - Cancer Research
IS - 23
ER -